feat(parcel-sync): show county in UAT search dropdown via eTerra data

PATCH /api/eterra/uats fetches counties from eTerra nomenclature and
LIMITE_UAT layer, then batch-updates GisUat records with county name
and workspacePk. Auto-triggers on first eTerra connection when county
data is missing. Helps distinguish same-name UATs in different counties.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/modules/parcel-sync/components/parcel-sync-module.tsx

@@ -553,10 +553,38 @@ export function ParcelSyncModule() {
   }, [fetchDbSummary]);
 
   /* ════════════════════════════════════════════════════════════ */
-  /*  (Sync effect removed — POST seeds from uat.json, no        */
-  /*   eTerra nomenclature needed. Workspace resolved lazily.)    */
+  /*  Auto-refresh county data when eTerra is connected            */
   /* ════════════════════════════════════════════════════════════ */
 
+  const countyRefreshAttempted = useRef(false);
+
+  useEffect(() => {
+    if (!session.connected || countyRefreshAttempted.current) return;
+    if (uatData.length === 0) return;
+
+    // Check if most UATs are missing county data
+    const withCounty = uatData.filter((u) => u.county).length;
+    if (withCounty > uatData.length * 0.5) return; // >50% already have county
+
+    countyRefreshAttempted.current = true;
+    console.log("[uats] Auto-refreshing county data from eTerra…");
+
+    fetch("/api/eterra/uats", { method: "PATCH" })
+      .then((res) => res.json())
+      .then((result: { updated?: number; error?: string }) => {
+        if (result.updated && result.updated > 0) {
+          // Reload UAT data with fresh county info
+          fetch("/api/eterra/uats")
+            .then((res) => res.json())
+            .then((data: { uats?: UatEntry[] }) => {
+              if (data.uats && data.uats.length > 0) setUatData(data.uats);
+            })
+            .catch(() => {});
+        }
+      })
+      .catch(() => {});
+  }, [session.connected, uatData]);
+
   /* ════════════════════════════════════════════════════════════ */
   /*  UAT autocomplete filter                                     */
   /* ════════════════════════════════════════════════════════════ */